Cole Hersee 24059BP 12V SPST Continuous Duty Solenoid – 85A
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Continuous Duty Solenoid for High-Cycle Marine and Vehicle Applications
The Cole Hersee 24059BP is a 12V SPST continuous duty solenoid rated at 85A — built for applications where the solenoid needs to stay energized for extended periods without overheating. Unlike intermittent-duty solenoids that are designed only for brief activation (like engine cranking), this unit handles sustained current loads reliably, making it the right choice for windlass controls, electric winches, bilge pump circuits, and other high-cycle or long-duration switching applications.
The insulated steel housing protects the internals from vibration, moisture, and the kind of harsh conditions common in marine engine compartments and bilge areas. Normally open contacts mean the circuit is off at rest and closes only when the solenoid is energized — a safe default for most marine accessory applications.
Key Features
- SPST configuration — Single Pole, Single Throw (Off / On)
- Continuous duty rated — designed for sustained energized operation
- 85A continuous current rating at 12V DC
- Normally open contacts — circuit open at rest, closed when energized
- Insulated steel housing for vibration and moisture resistance
- 12V DC coil voltage
Compatible Applications
- Anchor windlass and electric winch control circuits
- Bilge pump high-current switching
- Electric thruster and bow thruster solenoid control
- Battery isolation and switching circuits
- High-cycle accessory circuits requiring continuous duty operation
- Marine engine compartment and below-deck electrical systems
- 12V DC systems requiring remote high-current switching
Parts Desk Insights
Best use case: The 24059BP is the right solenoid when you need to switch high-current loads remotely — particularly for windlass and winch circuits where the solenoid stays energized throughout the operation cycle. The continuous duty rating is the critical spec here: an intermittent-duty solenoid in the same application will overheat and fail prematurely. It’s also a solid choice for bilge pump circuits where the pump may run for extended periods and a relay-style switch isn’t sufficient for the amperage.
Related products: For a master battery disconnect switch rather than a remote-switching solenoid, see the Cole Hersee 880062BP SR Series Master Battery Disconnect Switch. For automatic charging relay applications, the Blue Sea Systems BatteryLink ACR Automatic Charging Relay handles dual-battery management automatically.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.